Self-filling fountain-pen.



J. GILBERT.

SELF FILLING FOUNTAIN PEN. APPLICATION FILED AUG.5, 1912.

lwucwlboa ...|u5iin Gilbert.

UNITED STATES PATE .'rUsTiu GILBERT, or vic'roiinfBiimIsH domini; GANJJA.'

inosas.

i suction through the feed-supply duct; oner TOEFIGE.

sEL'FlriLniive roNrAIiv-rnn.

Self-Filling Fountain-Pens, of which .the r following is a specifications w My invention relates to apparatus or means for quickly filling a fountain pen by of the objects of my invention being to provide a larger reservoir for the ink than it is possible tosecure in an of the other types of self-filling pens wit out increasing the diameter or length of the ink-holding barrel or reservoir.

My invention consists informing theink.

reservoir of two barrels, one of the barrels fitting within the other telescopically, there being an ink-tight acking between the two barrels to prevent t e ink leaking from the reservoir. j

'ln the `drawing-Figure l is a longitudinal sectional view of a self-filling fountain pen embodying my invention, the' parts being shown in normal position; Fig. 2 is aparts in abnormal posimilar view with the sition.

A self-filling fountain pen constructed according to-my iinvention is provided with a main barrel l and a subsidiary barrel 2, both barrels being open'at one end, the 'subsidiary barrel 2` being telescoped within the main barrel 1.

The main barrel 1 carries at its forward end the pennib 3 which is suitably secured therein. l4 is a skeleton frame firmly secured in the` main barrel l4 near its forward end, from which projects rearwardly anarm 5 -provided with a tooth 6 at its rear end Adisposed at right angles thereto, which is constructed vto engage a spiral groove"7 formed in the inner face' of the subsidiary barrel 2 as shown.l

An link-tight packing is secured in an annular groove 8 formed in the outer face of the subsidiary barrel 2 near its( inner end, and while' any suitable packing maybe used, I prefer to use aA fibrous packing 9 impregnated with aphite,` thus providing a permanently 11%' two barrels mounted upon a soft rubber gasket 9 which insures a continuous ressure of the fibrous packing against the ot er barrel,

thus Vmaintaining an ink-tight joint between ricated packing between thel Specicationof Letters lllatcnt. Allg'. 2 5, 1914..

. animation mea ingaat 5, 1912. serial No. 713,389. 1

I 'the two barrels'fat'all times andunder all" 'f It iis immatelril'as 'far as invention is concerned, whether the subsidiary 'barrel fits withinjthe'fmain ybairel or outside thereof. rI he tooth o'r pin which engagesthe spiral groove acts as a stop to prevent the operator from entirely :separatingtlxe two barrels.'

The subsidiary andniain Ibarrels being telescoped, the nib is immersedyin ink and the subsidiary barrel pulled outwardly to abnormal position, thus drawing ink in through the feed duct to he extent of the vacuum created by thus extending the length of the ink reservoir. li prefer to have the length of the movement such that the pen is half lled to itsentire capacity by the one operation. Then the nib is held upward and the barrels are again telescoped expelling all air from the reservoir, whereupon the intaking of the ink may be repeated as just above described, thus filling the ink reservoir .to its full capacity.

Means for preventing accidental telescop-v ing of the 'two barrels residesin the tooth 6 coacting with the s iral groove, and this last means is the pre erred construction.

The pitch of the spiral groove is such as to prevent telescopic movement of the two barrelsby end to end pressure. The telescopic moyement is accomplished only by twisting the barrels relatively and the length of the spiral groove is regulated relatively to the length of the two barrels, so that the end wall of the groove is accurately positionedto serve as an abutment forthe tooth 6to prevent further relative movement between the two barrels.

The subsidiary barrel acts asa piston by reason'of the joint formed by the packing -between the two barrels. l

The ink reservoir feed duct may be quickly cleaned in water b the saine movement of .the two barrels as in filling with ink.

By my invention I. have eliminated the 'oint between the` feed duct and the main arreland extended the main barrel to the pen nib, thus. simpliflying the construction. By my invention,A provide a self-filling fountain en of maximumcapacity and of very simp e construction..

Iclaim:

1. In a self-filling fountain pen having an ink reservoir con'xposed` oftwo barrels mutuico ally opening into other and sliding one i inthe othertel'escopically foi-fthe purpose of making ink', thcombination cfa spiral groove made inside -of one barrel and a frame attached to the' other barrel and carry;-

ing the stud which fits into the spiral groove and produces the telescopic movementof the two ybarrels when one is .twisted relatively to the other for the purpose of intaking ink, substantially as described...

2. In a self-filling fountain pen having an ink reservoir composed of two barrels mutuallyopening into each other and slidable one in the other telescopically for the purpose of intaking ink, the combination of a. spiral groove formed in the inner face of one 0f 4 said barrels, and a frame attached Ito the l. In presence of two witnesses- ROBERT M. Nlnwooixm,I EDWARD HUEsTIs. 

